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Articles de revues sur le sujet « Bacteria Effect of radiation on »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 1 février 2022

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1

Rajasekhar, E., G. Jaffer Mohiddin, M. Srinivasulu, V. Rangaswamy, and R. Jeevan Kumar. "Effect of ionizing radiation on soil bacteria, fungi and germination of red gram seeds (Cajanus cajan L.)." South Asian Journal of Experimental Biology 3, no. 1 (March 10, 2013): 24–30. http://dx.doi.org/10.38150/sajeb.3(1).p24-30.

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Effect of ionizing radiation on survival of bacteria, fungi and red gram seed (Cajanus cajan L.) germination was assessed in laterite soil in the laboratory. The mercury vapor lamp (l = 400 nmâ€700 nm), sodium vapor lamp (l =589.3 nm ) and ultra violet (l = 400 nm â€ 10 nm) radiations were exposed to the laterite soils for 20, 40, 60 and 80 min and their effect on survival of bacterial, fungal colonies and seed germination were enumerated. Sodium vapor was found to be very effective in inhibiting the bacterial and fungal populations. Ultra violet radiation was efficient in reducing the survi

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Patel, Priya, Hiteshi Patel, Dhara Vekariya, Chinmayi Joshi, Pooja Patel, Steven Muskal, and Vijay Kothari. "Sonic Stimulation and Low Power Microwave Radiation Can Modulate Bacterial Virulence Towards Caenorhabditis elegans." Anti-Infective Agents 17, no. 2 (July 5, 2019): 150–62. http://dx.doi.org/10.2174/2211352516666181102150049.

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<P>Background: In view of the global threat of antimicrobial resistance, novel alternative approaches to deal with infectious bacteria are warranted, in addition to the conventional invasive therapeutic approaches. Objective: This study aimed at investigating whether exposure to sonic stimulation or microwave radiation can affect virulence of pathogenic bacteria toward the model nematode host Caenorhabditis elegans. Methods: Caenorhabditis elegans worms infected with different pathogenic bacteria were subjected to sonic treatment to investigate whether such sound treatment can exert any

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ITO, Hitoshi. "Effect of radiation decontamination on drug-resistant bacteria." FOOD IRRADIATION, JAPAN 41, no. 1-2 (2006): 9–13. http://dx.doi.org/10.5986/jrafi.41.9.

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Lin, Tao, Bo Cai, and Wei Chen. "Limnoithona sinensis as refuge for bacteria: protection from UV radiation and chlorine disinfection in drinking water treatment." Canadian Journal of Microbiology 60, no. 11 (November 2014): 745–52. http://dx.doi.org/10.1139/cjm-2014-0347.

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In this study, we tested the potential of Limnoithona sinensis to provide its attached bacteria refuge against disinfection. The experimental results indicated that in water devoid of zooplankton, both UV radiation and chlorine disinfection significantly decreased the viability of free-living bacteria. In the presence of L. sinensis, however, the attached bacteria could survive and rapidly recover from disinfection. This demonstrated that L. sinensis provided protection from external damage to various aquatic bacteria that were attached to its body. The surviving bacteria remained on L. sinens

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Hughes, Kevin A. "Effect of Antarctic solar radiation on sewage bacteria viability." Water Research 39, no. 11 (June 2005): 2237–44. http://dx.doi.org/10.1016/j.watres.2005.04.011.

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Bauza-Kaszewska, Justyna, Krzysztof Skowron, Zbigniew Paluszak, Zbigniew Dobrzański, and Mścisław Śrutek. "Effect of Microwave Radiation on Microorganisms in Fish Meals." Annals of Animal Science 14, no. 3 (July 29, 2014): 623–36. http://dx.doi.org/10.2478/aoas-2014-0020.

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AbstractThis study was aimed at testing the effect of microwave radiation on survival of E. coli, Salmonella Enteritidis, Enterococcus spp. and Clostridium spores in two kinds of fish meals. The material used in the study consisted of samples of two kinds of fish meal – salmon and cod. In the experiment samples of both kinds of fish meals were inoculated with suspensions of tested bacteria and spores of Clostridum sporogenes. After inoculation the material was exposed to microwave radiation with a frequency of 2.45 ghz and microwave energy power of 0, 100, 180, 300, 450, 600 and 700 w, respect

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Alonso-Sï¿½ez, Laura, Josep M. Gasol, Thomas Lefort, Julia Hofer, and Ruben Sommaruga. "Effect of Natural Sunlight on Bacterial Activity and Differential Sensitivity of Natural Bacterioplankton Groups in Northwestern Mediterranean Coastal Waters." Applied and Environmental Microbiology 72, no. 9 (September 2006): 5806–13. http://dx.doi.org/10.1128/aem.00597-06.

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ABSTRACT We studied the effects of natural sunlight on heterotrophic marine bacterioplankton in short-term experiments. We used a single-cell level approach involving flow cytometry combined with physiological probes and microautoradiography to determine sunlight effects on the activity and integrity of the cells. After 4 h of sunlight exposure, most bacterial cells maintained membrane integrity and viability as assessed by the simultaneous staining with propidium iodide and SYBR green I. In contrast, a significant inhibition of heterotrophic bacterial activity was detected, measured by 5-cyan

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Dion, Paule, Raymond Charbonneau, and Chantal Thibault. "Effect of ionizing dose rate on the radioresistance of some food pathogenic bacteria." Canadian Journal of Microbiology 40, no. 5 (May 1, 1994): 369–74. http://dx.doi.org/10.1139/m94-060.

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Food pathogenic bacteria including Listeria monocytogenes (1A1 and ATCC 19111), Staphylococcus aureus (GD13 and ATCC 13565), Escherichia coli 0157:H7 (ATCC 35150), Salmonella typhimurium, Yersinia enterocolitica, Vibrio parahaemolyticus, and Campylobacter jejuni were exposed to various rates of ionizing radiation (0.78, 2.6, and 22 kGy/h) emitted by three different 60Co irradiators. D10 values (D10 is the radiation dose required to eliminate 90% of a bacterial population (one logarithmic cycle reduction)) were calculated for the various strains and growth conditions tested. A covariance analys

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AL.Bayatti, Khalid K. "The Effect of Ionizing Radiation on Microorganism in some spices." Iraqi Journal of Veterinary Medicine 33, no. 1 (June 30, 2009): 149–54. http://dx.doi.org/10.30539/iraqijvm.v33i1.728.

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The present study was undertaken to evaluate the use of ionizing radiation in decontaminating thetotal microbial burden of Capsicum peppers (Capsium annuum), Caraway (Carum carvi), and Clove(Dianthus caryphyllus). The spices were irradiated in polyethylene bags with 5KGy and 10KGy ofgamma radiation from Co-60 irradiator. Total number of bacteria and molds survived per gram ofspices after irradiation were calculated. Results showed that 5KGy gamma radiation reduced the totalnumber of bacteria by 95-98% and the number of molds and yeast by 62.8-98.2%, while 10KGyreduced the total number of bacte

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Lu, Winston I., and Dominic P. Lu. "The Bacteriostatic and Bactericidal Effects of Radiation from Dental and Medical X-Rays." Acupuncture & Electro-Therapeutics Research 45, no. 1 (August 24, 2020): 3–14. http://dx.doi.org/10.3727/036012920x15958782196790.

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The purpose of this research was to proce or disprove the widely held beliefs that X-ray radiation used in medical or dental applications may affect the normal oral flora, and may also have effects on the micro-organisms existing in the oral cavity of every person. Such beliefs might be due to the common knowledge that radiation therapy has been utilized for the long time in the cancer patients to destroy the cancerous cells, and that radiation are also widely used in agriculture to prolong the shelf life of the farm products by destroying the decay-causing microorganisms existing in the agric

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Kudryasheva, N. S., and T. V. Rozhko. "Effect of low-dose ionizing radiation on luminous marine bacteria: radiation hormesis and toxicity." Journal of Environmental Radioactivity 142 (April 2015): 68–77. http://dx.doi.org/10.1016/j.jenvrad.2015.01.012.

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TURGIS, M., J. HAN, J. BORSA, and M. LACROIX. "Combined Effect of Natural Essential Oils, Modified Atmosphere Packaging, and Gamma Radiation on the Microbial Growth on Ground Beef." Journal of Food Protection 71, no. 6 (June 1, 2008): 1237–43. http://dx.doi.org/10.4315/0362-028x-71.6.1237.

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Selected Chinese cinnamon, Spanish oregano, and mustard essential oils (EOs) were used in combination with irradiation to evaluate their ability to eliminate pathogenic bacteria and extend the shelf life of medium-fat-content ground beef (23% fat). Shelf life was defined as the time when the total bacterial count reached 107 CFU/g. The shelf life of ground beef was determined for 28 days at 4°C after treatment with EOs. The concentrations of EOs were predetermined such that sensory properties of cooked meat were maintained: 0.025% Spanish oregano, 0.025% Chinese cinnamon, and 0.075% mustard. G

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Gupta, Sakshi Satyendranarayan. "U.V radiation effect on growth and survival of bacteria Staphylococcus aureus." Asian Journal of Pharmaceutical Analysis 11, no. 1 (2021): 27–28. http://dx.doi.org/10.5958/2231-5675.2021.00005.3.

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Al-Hakami, Samer M., Amjad B. Khalil, Tahar Laoui, and Muataz Ali Atieh. "Fast Disinfection ofEscherichia coliBacteria Using Carbon Nanotubes Interaction with Microwave Radiation." Bioinorganic Chemistry and Applications 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/458943.

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Water disinfection has attracted the attention of scientists worldwide due to water scarcity. The most significant challenges are determining how to achieve proper disinfection without producing harmful byproducts obtained usually using conventional chemical disinfectants and developing new point-of-use methods for the removal and inactivation of waterborne pathogens. The removal of contaminants and reuse of the treated water would provide significant reductions in cost, time, liabilities, and labour to the industry and result in improved environmental stewardship. The present study demonstrat

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Brook, Itzhak, Richard I. Walker, and Thomas J. MacVittie. "Effect of radiation dose on the recovery of aerobic and anaerobic bacteria from mice." Canadian Journal of Microbiology 32, no. 9 (September 1, 1986): 719–22. http://dx.doi.org/10.1139/m86-130.

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The presence of aerobic and anaerobic bacteria in the blood, spleen, and liver was investigated in mice that were exposed to 7, 8, 9, or 10 Gy 60Co radiation. Microorganisms were detected more often in animals exposed to higher doses of radiation. The number of mice that were culture positive and the number of isolates in one site increased with increasing dose. Bacteria were recovered in mice killed at various times after radiation, in 3 of 100 mice exposed to 7 Gy, in 13 of 100 irradiated with 8 Gy, in 23 of 90 exposed to 9 Gy, and in 34 of 87 irradiated with 10 Gy. The predominant organisms

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Kaya, A. Uğur, Selahaddin Güner, Marklen Ryskin, Azaria Stephano Lameck, Ana R. Benitez, Uri Shuali, and Shlomo Nir. "Effect of Microwave Radiation on Regeneration of a Granulated Micelle–Clay Complex after Adsorption of Bacteria." Applied Sciences 10, no. 7 (April 7, 2020): 2530. http://dx.doi.org/10.3390/app10072530.

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Granulated micelle–clay complexes including the organic cation octadecyltrimethylammonium (ODTMA) were shown to be efficient in removal of total bacteria count (TBC) from water. Microwave (MW) heating of granules to restore bacterial removal was investigated. Drying of granules by MW required 20-fold less energy than by conventional heating. When water content of granules approached 10%, or less, their heating period by MW had to be below 1 min, e.g., 30 s, and less, in order to avoid ignition and irreversible structural changes. Structural and thermal properties of MW heated samples were stud

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Yahya, Esam, Ali M. Almashgab, Muhanad Abdullah Abdulsamad, Abdulmutalib Alabeed Allaq, Amaal Mohammed Alqadhi, Fatima M. Garatem, and Sara S. Aljundi. "Evaluation the Effect of Microwave Radiation on Gram Positive and Negative Bacteria." Journal of Chemistry and Nutritional Biochemistry 2, no. 1 (April 30, 2021): 39–45. http://dx.doi.org/10.48185/jcnb.v1i1.136.

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Using microwave oven nowadays has become necessary due to the need for speed in our daily activities. It is widely used in hating, thawing, and even cooking of food. It has been also used in sterilization and decontamination of food from microorganisms. This study aimed to evaluate thermal and non-thermal effect of a regular house holding microwave oven on Staphylococcus aureus and Escherichia coli. Bacterial suspension is exposed to microwave radiations in different strength and durations and compared to unexposed cultures. During microwave treatment, non-thermal effect is evaluated by puttin

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MOINI, SOHRAB, REZA TAHERGORABI, SEYED VALI HOSSEINI, MOHAMMAD RABBANI, ZOYA TAHERGORABI, XESÚS FEÁS, and FEREIDOON AFLAKI. "Effect of Gamma Radiation on the Quality and Shelf Life of Refrigerated Rainbow Trout (Oncorhynchus mykiss) Fillets." Journal of Food Protection 72, no. 7 (July 1, 2009): 1419–26. http://dx.doi.org/10.4315/0362-028x-72.7.1419.

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The effect of gamma radiation (0, 1, 3, and 5 kGy) on the shelf life of farmed rainbow trout (Oncorhynchus mykiss) fillets that were treated with sodium acetate and vacuum packaged and subsequently stored under refrigeration was studied by measuring microbiological, chemical, and organoleptic changes. Radiation affected populations of bacteria, namely, H2S-producing bacteria and Enterobacteriaceae (P &lt; 0.05). Initial total viable counts of the control samples were ca. 4.41 log CFU/g, whereas the respective counts in samples irradiated at 1, 3, and 5 kGy were 3.08, 1.46, and ≤1 log CFU/g

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Elagin, Vadim, Anton Smirnov, Vladimir Yusupov, Alexey Kirillov, Nadezhda Ignatova, Olga Streltsova, Evgeniy Grebenkin, and Vladislav Kamensky. "The bactericidal effect of continuous wave laser with strongly absorbing coating at the fiber tip." Journal of Innovative Optical Health Sciences 11, no. 05 (September 2018): 1850029. http://dx.doi.org/10.1142/s1793545818500293.

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The bactericidal effect of laser radiation with a quartz fiber-based transmission system with a strong absorption coating converter against bacteria associated with urological stones has been studied. Gram-negative rod Escherichia coli and the Gram-positive coccus Staphylococcus epidermidis, Staphylococcus aureus, Enterococcus faecalis and Enterococcus faecium were used in this study. Each bacterial species was treated by continuous-wave near infrared laser coupled with bare fiber tip or strongly absorption coating fiber tip. After treatment, the temperature of bacterial suspension was measure

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Balasubramaniam, Arun, Prakoso Adi, Tra My Do Thi, Jen-Ho Yang, Asy Syifa Labibah, and Chun-Ming Huang. "Skin Bacteria Mediate Glycerol Fermentation to Produce Electricity and Resist UV-B." Microorganisms 8, no. 7 (July 21, 2020): 1092. http://dx.doi.org/10.3390/microorganisms8071092.

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Bacteria that use electron transport proteins in the membrane to produce electricity in the gut microbiome have been identified recently. However, the identification of electrogenic bacteria in the skin microbiome is almost completely unexplored. Using a ferric iron-based ferrozine assay, we have identified the skin Staphylococcus epidermidis (S. epidermidis) as an electrogenic bacterial strain. Glycerol fermentation was essential for the electricity production of S. epidermidis since the inhibition of fermentation by 5-methyl furfural (5-MF) significantly diminished the bacterial electricity

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Rozhko, Tatiana V., Olga V. Kolesnik, Gennadii A. Badun, Devard I. Stom, and Nadezhda S. Kudryasheva. "Humic Substances Mitigate the Impact of Tritium on Luminous Marine Bacteria. Involvement of Reactive Oxygen Species." International Journal of Molecular Sciences 21, no. 18 (September 16, 2020): 6783. http://dx.doi.org/10.3390/ijms21186783.

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The paper studies the combined effects of beta-emitting radionuclide tritium and Humic Substances (HS) on the marine unicellular microorganism—luminous bacteria—under conditions of low-dose radiation exposures (<0.04 Gy). Tritium was used as a component of tritiated water. Bacterial luminescence intensity was considered as a tested physiological parameter. The bioluminescence response of the marine bacteria to tritium corresponded to the “hormesis” model: it included stages of bioluminescence inhibition and activation, as well as the absence of the effect. HS were shown to decrease the inhi

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Rijal, G. K., and R. S. Fujioka. "Synergistic effect of solar radiation and solar heating to disinfect drinking water sources." Water Science and Technology 43, no. 12 (June 1, 2001): 155–62. http://dx.doi.org/10.2166/wst.2001.0728.

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Waterborne diseases are still common in developing countries as drinking water sources are contaminated and feasible means to reliably treat and disinfect these waters are not available. Many of these developing countries are in the tropical regions of the world where sunlight is plentiful. The objective of this study was to evaluate the effectiveness of combining solar radiation and solar heating to disinfect contaminated water using a modified Family Sol*Saver System (FSP). The non-UV transmittable cover sheet of the former FSP system was replaced with an UV transmittable plastic cover sheet

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Atsumi, Tatsuo, Eriko Fujimoto, Masakazu Furuta, and Mikio Kato. "Effect of gamma-ray irradiation on Escherichia coli motility." Open Life Sciences 9, no. 10 (October 1, 2014): 909–14. http://dx.doi.org/10.2478/s11535-014-0332-z.

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AbstractThe effects of ionizing radiation on bacteria are generally evaluated from the dose-dependent survival ratio, which is determined by colony-forming ability and mutation rate. The mutagenic damage to cellular DNA induced by radiation has been extensively investigated; however, the effects of irradiation on the cellular machinery in situ remain unclear. In the present work, we irradiated Escherichia coli cells in liquid media with gamma rays from 60Co (in doses up to 8 kGy). The swimming speeds of the cells were measured using a microscope. We found that the swimming speed was unaltered

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Hernandez, Edgardo A., Gustavo A. Ferreyra, and Walter P. Mac Cormack. "Response of two Antarctic marine bacteria to different natural UV radiation doses and wavelengths." Antarctic Science 18, no. 2 (June 2006): 205–12. http://dx.doi.org/10.1017/s0954102006000241.

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The aim of this work was to investigate the effect of different fractions of UVR on two Antarctic marine bacteria (Arthrobacter UVvi and FCB-related UVps strains) and to study the relationship between the bacterial viability and the UVB dose. Ten experiments exposing strains to natural solar radiation were conducted in Potter Cove, South Shetland Islands. The effect of different UVR wavelengths on viability was analysed by using cultures in quartz bottles covered with interferential filters. Six treatments were performed: DARK, PAR (with UVR shielded off), UVA360, UVA320, UVB305 and UVB280. In

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Deller, Sigrid, Franz Mascher, Sabine Platzer, Franz Ferdinand Reinthaler, and Egon Marth. "Effect of Solar Radiation on Survival of Indicator Bacteria in Bathing Waters." Central European Journal of Public Health 14, no. 3 (September 1, 2006): 133–37. http://dx.doi.org/10.21101/cejph.a3380.

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Тучина, Е. С., та В. В. Тучин. "Фототермическое действие инфракрасного (808 nm) лазерного излучения и наночастиц золота в различных модификациях на S. aureus". Журнал технической физики 128, № 6 (2020): 840. http://dx.doi.org/10.21883/os.2020.06.49418.49-20.

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The effect of infrared laser radiation (808 nm) of different fluence rates on the bacteria Staphylococcus aureus 209 P, incubated in solutions of gold nanocubes, nanorods and on glass substrates with fixed nanodiscs, was studied. Radiation with a power density of 60 mW/cm2 in combination with nanocubes caused the death of 50% of the bacterial population after 30 min of exposure, in combination with nanostructures - 56%. An increase in the temperature of suspended matter after irradiation was found of no more than 5-6 °C. Radiation with a power density of 400 mW/cm2 caused a pronounced inhibiti

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Haque, Md Mansurul, MG Sorrowar, and Harun Ur Rashid. "Effects of frozen storage, radiation and their combined Treatments on microorganisms of freshwater mola fish Amblypharyngodon mola." Journal of Bangladesh Academy of Sciences 37, no. 1 (July 13, 2013): 21–31. http://dx.doi.org/10.3329/jbas.v37i1.15677.

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The study revealed that the total viable bacterial count, staphylococcal count, coliform count, faecal coliform count, Aeromonas count and total fungal counts varied from 8.8×107 to 1.27×108, 2.7×106 to 4.2×106, 9.0×104 to 1.03×105, 4.8×105 to 7.3×105, 2.7×105 to 5.0×105 and 1.6×103 to 3.5×103 cfu/gm, respectively. Seventy six bacterial strains were isolated and identified, where Staphylococcus aureus, Micrococcus varians, Aeromonas hydrophila, Klebsiella ozaenae, Bacillus subtilis, Escherichia coli, Bacillus megaterium, Klebsiella edwardsii, Pseudomonas aerugenosa and Micrococcus radiodurans

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Brook, Itzhak, and G. David Ledney. "Use of Selective Decontamination in the Prevention of Infection After Accidental Irradiation." Prehospital and Disaster Medicine 8, no. 1 (March 1993): 85–88. http://dx.doi.org/10.1017/s1049023x00040073.

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AbstractExposure to radiation induces a reduction in the number of gastrointestinal, anaerobic bacterial flora, and an increase in the number of Enterobacteriaceae that are associated with sepsis and mortality. Antimicrobials that suppress anaerobic flora have a deleterious effect on survival by promoting earlier enterobacterial sepsis. In contrast, in studies of animals and immunosuppressed patients, antimicrobials that inhibit gram-negative enteric bacteria and preserve the anaerobic flora have shown a beneficial effect by preventing bacterial translocation and fatal sepsis. The quinolone an

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Cheptsov, Vladimir S., Andrey A. Belov, Elena A. Vorobyova, Anatoli K. Pavlov, and Vladimir N. Lomasov. "Effects of Radiation Intensity, Mineral Matrix, and Pre-Irradiation on the Bacterial Resistance to Gamma Irradiation under Low Temperature Conditions." Microorganisms 9, no. 1 (January 19, 2021): 198. http://dx.doi.org/10.3390/microorganisms9010198.

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Ionizing radiation is one of the main factors limiting the survival of microorganisms in extraterrestrial conditions. The survivability of microorganisms under irradiation depends significantly on the conditions, in which the irradiation occurs. In particular, temperature, pressure, oxygen and water concentrations are of great influence. However, the influence of factors such as the radiation intensity (in low-temperature conditions) and the type of mineral matrix, in which microorganisms are located, has been practically unstudied. It has been shown that the radioresistance of bacteria can in

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Alcarde, André Ricardo, Júlio Marcos Melges Walder, and Jorge Horii. "Fermentation of irradiated sugarcane must." Scientia Agricola 60, no. 4 (December 2003): 677–81. http://dx.doi.org/10.1590/s0103-90162003000400011.

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Bacillus and Lactobacillus are bacteria that usually contaminate the ethanolic fermentation by yeasts and may influence yeast viability. As microorganisms can be killed by ionizing radiation, the efficacy of gamma radiation in reducing the population of certain contaminating bacteria from sugarcane must was examined and, as a consequence, the beneficial effect of lethal doses of radiation on some parameters of yeast-based ethanolic fermentation was verified. Must from sugarcane juice was inoculated with bacteria of the genera Bacillus and Lactobacillus. The contaminated must was irradiated wit

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Sasaki, Takayuki, Tiit Kauri, and Akira Kudo. "Effect of pH and temperature on the sorption of Np and Pa to mixed anaerobic bacteria." Applied Radiation and Isotopes 55, no. 4 (October 2001): 427–31. http://dx.doi.org/10.1016/s0969-8043(01)00104-x.

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Laheij, Alexa M. G. A., Johannes J. de Soet, Enno C. I. Veerman, Jan G. M. Bolscher, and Cor van Loveren. "The Influence of Oral Bacteria on Epithelial Cell MigrationIn Vitro." Mediators of Inflammation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/154532.

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Oral ulcerations often arise as a side effect from chemo- and radiation therapy. In a previous clinical study,Porphyromonas gingivaliswas identified as a positive predictor for oral ulcerations after hematopoetic stem cell transplantation, possibly incriminatingP. gingivalisin delayed healing of the ulcerations. Therefore, it was tested whetherP. gingivalisand its secreted products could inhibit the migration of oral epithelial cells in anin vitroscratch assay. To compare, the oral bacteriaPrevotella nigrescens,Prevotella intermedia,Tannerella forsythia, andStreptococcus mitiswere included. A

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Sulatri, Ni Luh, Ida Bagus Agung Yogeswara, and Ni Wayan Nursini. "Efektifitas sinar ultraviolet terhadap cemaran bakteri patogen pada makanan cair sonde untuk pasien immune-compremissed." Jurnal Gizi Indonesia (The Indonesian Journal of Nutrition) 5, no. 2 (June 30, 2017): 112–18. http://dx.doi.org/10.14710/jgi.5.2.112-118.

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Background : Food safety remained as critical concern to immune-compremissed patient. Food safety assurance can be achieved through inhibition of pathogenic bacteria by physical treatment such as UV light radiation. However, a study regarding the effect of UV light on growth of pathogenic bacteria in contaminated liquid food are scarce.Objective : To determine the effectiveness of UV light on contamination of pathogenic bacteria in liquid food for immune-compremissed patient.Methods : Randomized design with two factor which were holding time for 60 and 120 minutes and radiation exposure (0, 5,

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STERMER, RAYMOND A., MARGARET LASATER-SMITH, and CLAYTON F. BRASINGTON. "Ultraviolet Radiation—An Effective Bactericide for Fresh Meat." Journal of Food Protection 50, no. 2 (February 1, 1987): 108–11. http://dx.doi.org/10.4315/0362-028x-50.2.108.

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Ultraviolet radiation (UV), with principal energy at a wavelength of 253.7 nm, was effective in destroying bacteria on the surface of fresh meat. A radiation dose of 150 mW s/cm2 (275 uW/cm2 for 550 s) reduced bacteria on smooth surface meat (beef plate) about 2 log cycles (99% “kill”). Further increases in dose level to 500 mW s/cm2 (275 uW/cm2 for 1800 s) reduced the bacteria level one additional log cycle. Since UV radiation does not penetrate most opaque materials, it was less effective on rough surface cuts of meat such as round steak because bacteria were partly shielded from the radiati

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Xu, Fei, and Jaroslav Vostal. "Vitamin K3 Is a Potential Ultraviolet Photosensitizer for Pathogen Reduction of Human Platelets and Plasma." Blood 120, no. 21 (November 16, 2012): 3434. http://dx.doi.org/10.1182/blood.v120.21.3434.3434.

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Abstract Abstract 3434 Human platelets are stored up to 5 days at room temperature and may support bacterial growth before transfusion. Transfusion of bacterially contaminated platelets remains the highest transfusion transmitted infectious disease risk today. One approach to reducing this risk is the development of safe and effective pathogen reduction methodologies. We evaluated UV light (A and B) with vitamin K3 (VK3) as a photosensitizer for efficacy in reducing bacterial growth in platelet concentrates and plasma. Six species of bacteria, including Bacillus cereus, Pseudomonas aeruginosa,

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Santos, Ana L., Vanessa Oliveira, Inês Baptista, Isabel Henriques, Newton C. M. Gomes, Adelaide Almeida, António Correia, and Angela Cunha. "Effects of UV-B Radiation on the Structural and Physiological Diversity of Bacterioneuston and Bacterioplankton." Applied and Environmental Microbiology 78, no. 6 (January 13, 2012): 2066–69. http://dx.doi.org/10.1128/aem.06344-11.

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ABSTRACTThe effects of UV radiation (UVR) on estuarine bacterioneuston and bacterioplankton were assessed in microcosm experiments. Bacterial abundance and DNA synthesis were more affected in bacterioplankton. Protein synthesis was more inhibited in bacterioneuston. Community analysis indicated that UVR has the potential to select resistant bacteria (e.g.,Gammaproteobacteria), particularly abundant in bacterioneuston.

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Carrillo, P., J. M. Medina-Sánchez, C. Durán, G. Herrera, V. E. Villafañe, and E. W. Helbling. "Synergistic effects of UVR and simulated stratification on commensalistic phytoplankton–bacteria relationship in two optically contrasting oligotrophic Mediterranean lakes." Biogeosciences 12, no. 3 (February 4, 2015): 697–712. http://dx.doi.org/10.5194/bg-12-697-2015.

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Abstract. An indirect effect of global warming is a reduction in the depth of the upper mixed layer (UML) causing organisms to be exposed to higher levels of ultraviolet (UVR, 280–400 nm) and photosynthetically active radiation (PAR, 400–700 nm). This can affect primary and bacterial production as well as the commensalistic phytoplankton–bacteria relationship. The combined effects of UVR and reduction in the depth of the UML were assessed on variables related to the metabolism of phytoplankton and bacteria, during in situ experiments performed with natural pico- and nanoplankton communities fr

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Pantyo, V. V., V. I. Pantyo, and E. M. Danko. "The impact of piler-radiation on the growth rate of opportunistic microorganisms." Reports of Vinnytsia National Medical University 22, no. 2 (December 5, 2018): 272–75. http://dx.doi.org/10.31393/reports-vnmedical-2018-22(2)-07.

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The spread of resistant to antimicrobial agents strains of opportunistic microorganisms causes the search for new ways of struggle with them. Among these ways, special attention is drawn to the use of physical factors, in particular, different types of radiation, with potential antimicrobial activity. Purpose: to investigate the direct effect of the PILER wave length line on the growth rate of S.aureus ATCC 25923 and P.aeruginosa ATCC 27853 on solid nutrient media. The influence of PILER (Polarized Polychromatic Incoherent Low Energy Radiation) on various wavelengths on the growth intensity of

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Ulianova, O. V., S. S. Ulyanov, Zhang Zhihong, Zhou Sibo, and Qingming Luo. "Biophysical aspects of effects of laser radiation on living systems: II. Effect on Pseudomonas aeruginosa bacteria." Optics and Spectroscopy 107, no. 6 (December 2009): 927–33. http://dx.doi.org/10.1134/s0030400x09120157.

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Burchard, Thomas, Lamprini Karygianni, Elmar Hellwig, Marie Follo, Thomas Wrbas, Annette Wittmer, Kirstin Vach, and Ali Al-Ahmad. "Inactivation of oral biofilms using visible light and water-filtered infrared A radiation and indocyanine green." Future Medicinal Chemistry 11, no. 14 (July 2019): 1721–39. http://dx.doi.org/10.4155/fmc-2018-0522.

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Aim: To investigate the antimicrobial photodynamic therapy (aPDT) of visible light and water-filtered infrared A radiation in combination with indocyanine green (ICG) on planktonic oral microorganisms as well as on oral biofilm. Methods: The irradiation was conducted for 5 min in combination with ICG. Treatment with chlorhexidine served as a positive control. The number of colony forming units and bacterial vitality were quantified. Results: All tested bacterial strains and salivary bacteria were killed at a level of 3log10. The colony forming units of the initial mature oral biofilms were str

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They, Ng Haig, David Motta Marques, Rafael Siqueira Souza, and Lúcia Ribeiro Rodrigues. "Short-Term Photochemical and Biological Unreactivity of Macrophyte-Derived Dissolved Organic Matter in a Subtropical Shallow Lake." Journal of Ecosystems 2013 (July 30, 2013): 1–9. http://dx.doi.org/10.1155/2013/316709.

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Macrophytes have been associated with low bacterial metabolism in the littoral zones of lake Mangueira, but an explanation for this pattern is largely unknown. In this study, macrophyte-derived DOM was incubated in situ for the measurement of the effect of grazers, bacteria, and light on its degradation in three experiments. The water was separated in bulk, bacterial, and control (+ HgCl2) fractions and exposed to or hidden from sunlight for 120 h. Unchange in bacterial variables in the bulk fraction suggested a combined control of radiation and grazing on bacteria. Light treatment increased b

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Shah, Surabhi K., Edward A. Mcbean, and William A. Anderson. "Preliminary studies into the disinfection of potable water using solar radiation." Canadian Journal of Civil Engineering 23, no. 2 (April 1, 1996): 373–80. http://dx.doi.org/10.1139/l96-042.

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The efficacy and kinetics of water disinfection using solar radiation was studied, with respect to potential household or individual use in regions where treated drinking water is unavailable. Small volumes of sterilized water (1 L or less) were deliberately contaminated with various concentrations of Escherichia coli, and then exposed to solar radiation for several hours with periodic bacterial enumeration using plate count methods. An agar which was selective for fecal coliforms (mFC) was found to be inappropriate in this work as it often gave false negative counts, compared to the nonselect

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EL-NEZAMI, HANI, PASI KANKAANPÄÄ, SEPPO SALMINEN, and JORMA AHOKAS. "Physicochemical Alterations Enhance the Ability of Dairy Strains of Lactic Acid Bacteria To Remove Aflatoxin from Contaminated Media†." Journal of Food Protection 61, no. 4 (April 1, 1998): 466–68. http://dx.doi.org/10.4315/0362-028x-61.4.466.

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Lactobacillus rhamnosus GG and Lactobacillus rhamnosus LC-705, previously shown to effectively bind to aflatoxin B1, were subjected to various Chemical and physical treatments to examine the effects of these treatments on the binding affinity of these strains towards aflatoxin B1. Treatment of bacterial pellets of both strains with hydrochloric acid significantly (P &lt; 0.05) enhanced the binding ability when compared to nontreated pellets or pellets treated by other methods. An enhancement of bacterial ability to bind aflatoxin B1 was also observed when the bacterial pellets were subject

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Choi, Jeongyun, Aritra Roy Choudhury, Song-yi Park, Myung Min Oh, and Tongmin Sa. "Inoculation of ACC Deaminase-Producing Brevibacterium linens RS16 Enhances Tolerance against Combined UV-B Radiation and Heat Stresses in Rice (Oryza sativa L.)." Sustainability 13, no. 18 (September 7, 2021): 10013. http://dx.doi.org/10.3390/su131810013.

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UV-B radiation and high temperature have detrimental effects on plant physiological and biochemical processes. The use of bacterial inoculants for stress alleviation has been regarded as a sustainable and eco-friendly approach. Hence, this study was conducted to evaluate the ability of 1-aminocyclopropane-1-caboxylate (ACC) deaminase-producing Brevibacterium linens RS16 in enhancing stress tolerance in rice against combined UV-B radiation and heat stresses. A combination of 0.5 Wm−2 UV-B radiation and 40 °C of temperature were imposed on rice plants for 5 days. The plants imposed with combined

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Al-doori1, Aidah Abd, Awatef Saber Jasem1, and Adnan F. AL-Azzawie2. "Effects of Nd:Yag Laser on some virulence factor genes of Pseudomonas aeruginosa bacteria." Tikrit Journal of Pure Science 25, no. 2 (March 17, 2020): 86. http://dx.doi.org/10.25130/j.v25i2.962.

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The aim of this study was to assess effects of the 532nm Nd-yag laser on the genes of Tox A, Exo S, and Opr L, of Pseudomonas aeruginosa (P. aeruginosa) bacteria isolated from clinical (wounds, burns, otitis media) and environmental (water, soil) samples. Clinical samples were collected from patients coming to Saladdin General Hospital from wound, burns and middle ear infections while environmental samples were extracted from water and soil for Saladdin General Hospital . Bacterial samples irradiated by Nd-Yag laser with wavelength of 532 nm using energies (300mj,500mj) with (15 and 25 sec) an

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Janisiewicz, W. J., T. van der Zwet, and P. B. Jahrling. "Laboratory studies on the effect of gamma radiation on Erwinia amylovora survival on apple fruit." Canadian Journal of Microbiology 32, no. 10 (October 1, 1986): 787–90. http://dx.doi.org/10.1139/m86-144.

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Susceptibility of Erwinia amylovora to gamma irradiation was determined in vitro on test tube cultures and in vivo on apples and pears. Bacterial strains differed in susceptibility to irradiation. Higher doses of irradiation (ca. 80 krad (1 krad = 10 Gy)) were needed to kill the bacterium on fruit compared with test tube cultures (from 20 to more than 50 krad). Fruit with natural populations of E. amylovora collected from a severely blighted orchard, exposed to doses of 140 krad, still contained viable bacteria. Surviving E. amylovora were pathogenic to green 'Bartlett' pears. Five radiation-s

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Kunarti, Sri, Amellia Tjandra, and Edhie Arif Prasetyo. "EFFICACY OF DIODE LASSER 405 NM WITH CHLOROPHYLLS AS PHOTOSENSITIZER ON Enterococcus faecalis." Conservative Dentistry Journal 8, no. 2 (December 5, 2019): 91. http://dx.doi.org/10.20473/cdj.v8i2.2018.91-95.

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Background: The presence of persistent infections in the root canals by microorganisms causes root canal failure. The most commonly found bacteria that cause persistent infection is Enterococcus faecalis. PDI / photodynamic inactivation is an in vitro approach to inactivation of microorganisms. The combination of light and photosensitivity of chlorophyll in PDI will cause photoinactivation in bacteria. Long radiation of PDT can affect the production of singlet oxygen and ROS (Reactive Oxygen Species) to kill Enterococcus faecalis bacteria. Objective: To prove the effect of 405 nm laser diode w

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Zieliński, Marcin, and Magdalena Zielińska. "Impact of microwave radiation on nitrogen removal and quantity of nitrifiers in biofilmA paper submitted to the Journal of Environmental Engineering and Science." Canadian Journal of Civil Engineering 37, no. 4 (April 2010): 661–66. http://dx.doi.org/10.1139/l09-171.

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The aim of this study was to determine the impact of microwave radiation on the efficiency of nitrification and on the percentage of ammonia-oxidizing bacteria in biofilm and to study the possibility of the occurrence of nonthermal effects caused by the interaction of microwaves and biofilm. Eight trickling filters with a biofilm were used in the experiment: four were exposed to microwave radiation, and four were heated with warm air as a control group. Microwave radiation at a frequency of 2.45 GHz was applied at an intensity of 18 W (0.01 W·cm–3of the reactor packing), which increased the bi

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Malalur, Pannaga G., Xiaokui Mo, Rebecca Hoyd, David Paul Carbone, and Daniel Spakowicz. "Intra-tumoral microbes and overall survival in colorectal cancer patients." Journal of Clinical Oncology 38, no. 15_suppl (May 20, 2020): 4083. http://dx.doi.org/10.1200/jco.2020.38.15_suppl.4083.

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4083 Background: The presence of certain bacteria among or adjacent to tumor cells may contribute to colorectal cancer (CRC) development. However, the effect of the tumor microbiome on survival in CRC patients undergoing treatment is poorly understood. We hypothesize that intra-tumoral microbes correlate with overall survival (OS) in CRC patients. Methods: We obtained RNA-seq data from CRC tumor biopsies from patients treated at The Ohio State University Comprehensive Cancer Center as part of the Oncology Research Information Exchange Network (ORIEN). Reads were aligned to human and exogenous

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Bekturova, Assemgul, Zhannur Markhametova, and Zhaksylyk Masalimov. "Plasmids Role in Survival of Acinetobacter calcoaceticus A1 Exposed to UV-Radiation and Hydrocarbons." Advanced Materials Research 905 (April 2014): 151–55. http://dx.doi.org/10.4028/www.scientific.net/amr.905.151.

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The role of plasmids in hydrocarbon-degrading bacteriaAcinetobacter calcoaceticus A1survival to UV-radiation and hydrocarbons was studied. Natural plasmids-containingA. calcoaceticus A1showed high resistance to UV-radiation.A. calcoaceticus A1showed active growth under exposed to UV-radiation for up to 30 minutes. Combined effects of UV-radiation and petroleum hydrocarbons did not considerably reduce the growth of strains. It was shown a stimulating effect of UV-radiation on the growth curves of strains ofA. calcoaceticus A1. Constructed recombinant strain (E.coli XL blueRec) showed the abilit

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